Merchants (total) might be a touch misleading - i.e. one Urban Outfitters is 100x the combined total of 10 - 12 small Aus regional or NZ based merchants with very small addressable markets - just something to keep in mind.
Anyway, this one is not yet announced (I believe) but is active in the U.S. now with a $35 payment minimum - just a bit of insight from watching various social media channels as discussed above:
Have a look at the amount of Instagram followers for best indication of the traction with their particular target market.